Propane works but one of the fine tipped butane torches like a Bernzomatic is likely a better choice. Back in the day I did most of my lab glass blowing and bending just using an alcohol lamp and a blow pipe, but I think for most folks a small torch is a better way to go! One thing about glass, that is much like iron, is that it doesn't transfer heat well along its length, so you'll be surprised at how close to the part that is glowing orange that you can still grip the tube ..... but don't get too close or you'll know all about it in a real hurry!!!